Rauland Sax100 Power Amplifier 电路图.pdf

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1、INSTALLATION AND SERVICE INSTRUCTIONS SAX100 SOLID STATE POWER AMPLIFIER D E S C R I P T I O N : The SAX100 is a 100 watt solid state power amplifier with Amp. switched and 0.1 Amp. direct auxiliary D.C. power supplies included. The unit is provided with a power relay which controls the amplifier, t

2、he Amp. D.C. out- put, and the A.C. receptacles from a remote Off-On switch. To secure the best performance it is suggested that the following instructions be read very carefully. Upon re- ceipt of the amplifier the packing list should be checked to determine if all items have been received in good

3、con- dition. Any physical damage found should be reported at once to the transportation company as all claims for damage must be made by the consignee. The amplifier should be tested immediately upon receipt as any damage due to rough handling by the transportation company should also be reported an

4、d claim filed for concealed damages. S P E C I F I C A T I O N S : Rated Output: 100 watts RMS Peak Output: 200 watts Gain: 77db Frequency Response: 2 db 25 - 20,000 Hz Distortion: Less than 3% at rated output 50 - 5,000 Hz Noise Level: 80 db below rated output Regulation: Less than 2 db Operating T

5、emperature Range: OF to 130F Input Impedance: 50,000 ohms Input Voltage Required: 0.3 volt for rated power output Output Impedance: 6.25 ohms, 25 volts isolated or 50 ohms, 70.7 volts isolated. 105/130 VAC, 60 Hz Power Requirements: No Signal: 25 watts l/3 Rated Power Output: 165 watts Rated Power O

6、utput or if no ground connection is made, the out- put voltage will be balanced. If it is necessary that a center point between the two lines be grounded, a 2,200 ohm 5% 1 watt composition resistor may be connected from each side of the output to ground. The output connections are available on the n

7、ine pin plug on the rear of the unit. The mating plug should be wired as shown below in Fig. No. 1 for either 25 volt or 70 volt output. Assembly of the plug and pins is shown in Fig. No. 2. USE MALE PINS IN OUTPUT PLUG JUMPER 2.5 AND 8 TOGETHER JUMPER 3.6 AND 9 T0GETHER TAKE OUTPUT FROM 8 AND 9 CAB

8、LE CONNECTOR RAULAND PART NO. SM-0263 70 VOLT OUTPUT 40 OHMS JUMPER, AND 5 TOGETHER JUMPER 6 AND 8 TOGETHER TAKE 0UTPUT FROM 2 AND 9 FIG. NO. 1. POWER LINE CONNECTIONS The amplifier is provided with two A.C. line power transformer taps. If the amplifier is to be used on aline voltage of less than 12

9、0 volts, the 120V tap should be used. If the line voltage is greater than 12OV, the 13OV tap should be used. These connections are accessible in the upper left hand corner of the front chassis of the amplifier. The amplifier is shipped from the factory wired for 130 volt operation. The red-black wir

10、e is used for the 130 volt connection, the yellow-black for the 120 volt connection. To change the line voltage tap, disconnect the wire going to the red-black lead and connect it to the yellow-black, or vice versa. CAUTION: BE SURE AC LINE CORD IS UNPLUGGED BEFORE MAKING THIS MODIFICATION. STRIP WI

11、RE 3/16 INCH CRIMP AROUND/ WIRE AND SOLDER INSERT PIN FROM REAR OF RECEPTACLE UNTIL PIN IS LOCKED INTO PLACE. FIG. No. 2 RadioFans.CN 收音机爱 好者资料库 SYSTEM GROUNDING OPERATION: In any sound system it is necessary for the audio common to be connected to the equipment chassis some- where in the system. On

12、 the SAX100 the NEGATIVE side of the power supply is also the audio common. Further, it is recommended that for best results ONLY ONE such connection be made in the entire system. It is not always possible to predict the best location for this connection, however, through experience Rauland has foun

13、d that generally the best place for this connection is on the PRE-AMPLIFIER chassis. All Rauland pre- amplifiers are supplied with this chassis connection. If the amplifier is to be used without a Rauland pre-ampli- fier, some other chassis to negative connection MUST BE PROVIDED. As shipped, THE SA

14、X100 HAS NO CONNECTION FROM CHASSIS TO POWER SUPPLY NEGATIVE. AUXILIARY D.C. POWER OUTLET The SAX100 is able to furnish D.C. power for the operation of relays and pre-ampl if iers. The power available is shown below and in Fig. No. 3. Pin assembly is shown in Fig. No. 2. VOLTAGES AVAILABLE 28 Volts

15、Pos (not-switched) Negative Common PIN CONNECTIONS No. 7 No. 3 No. 1 MAXIMUM CURRENT 0.5 Amp. loo MA. MALE CABLE CONNECTOR RAULAND PART NO. SN-0263-A KE POSITIVE 28V 0.1 AMP. UNSWITCHED Y (FEMALE) 0 I POSITIVE 28V AMP. SWITCHED FIG. NO. 3 NOTE: Pins No. 1, 3, 4, and 7 are male pins. Pin No.5, the ke

16、y pin, is female and must be in place to prevent accidental connection to the AUDIO OUTPUT SOCKET. When plugged into the power line, only the power transformer of the SAX100 remains energized. This pro- vides a voltage for the control relay. The control relay is actuated by completing the circuit be

17、tween wires from pins #1 (Negative Common) and #4 of the D.C. output and control plug. This turns on the amplifier, D.C. supply, and A.C. receptacles. Once on, the output level of the amplifier may be adjusted with the input level control. Protective Devices: Line Fuse: The amplifier has a 3 ampere

18、line fuse. This is located inside the front chassis of the ampli- fier in the upper left hand corner. Replace only with a 3 amp 3 AG SLO-BLO fuse. Thermal Overload Relay: If the temperature of the amplifier rises to an unsafe level, the thermal over- load relay located on one of the output stage hea

19、t sinks will turn off the primary power. When the ampli- fier cools to a safe operating level once more, the thermal overload relay will automatically reset. A second thermal overload relay protects the Amp. D.C. output circuit. If an overload should occur the thermal overload relay will open the ci

20、rcuit for several seconds and then automatically reset. This cycle will continue until the overload is removed. HEAT SINK WITH SOCKET ATTACHED / MICA WASHER /& f / COAT MICA WASHER ON BOTH SIDES WITH DOW CORNING DC-4 SILICON GREASEOREQUIVALENT. TO-3CASE TRANSISTOR MOUNTINGSCREWS #6xSHEET METAL SCREW

21、S FIG. NO. 4 (Continued) SERVICE NOTES 1) REPLACEMENT OF POWER TRANSISTORS: If it is necessary to replace power transistors, the following diagram (Fig. No. 4) must be followed to mount new transistors. Also, there is a colored num- ber indicating the transistor gain group on the case of the transis

22、tor. The replacement transistor(s) must have the same number and color as the one removed. After a new transistor has been mounted with the mica insulating washer, check to see if its case is in- sulated from the heat sink. To do this, check between the transistor case and the heat sink, with an ohm

23、meter. If there is a resistance indicated, the case of the tran- sistor is shorted to the heat sink. ANY CHASSIS TO COMMON CONNECTION MUST BE DISCONNECTED WHEN MAKING THIS MEASUREMENT. OUTPUT ADJUSTMENTS The output stages of the coupled from capacitors Cl4 SAX100 amplifier are direct and Cl5 through

24、 transistors Q10, Q 1 1 , Q12, Q13, Q14, Q15, Q16 and Q17 to the out- put transformer primary. Replacement of transistors in this circuit will require a check of the output balance to insure best performance. Required Equipment: 1) 50 mi II ivolt D.C. meter. 2) A.C. voltmeter capable less. of indica

25、ting .003 volt or Potentiometer RP-2 and RP-3 control the zero signal bias for Q10, Q13, Q16 & Q17 and Q 1 1 , Q12, Q14, & Q15 respectively. 1) 2) 3) 4) 5) Connect the O-50 mi llivolt meter across one of tha 0.25 ohm 5 watt output emitter resistors. (R64, R66 or R63, R65). Adjust RP-2 or RP-3, which

26、ever is associated with the side of the amplifier being adjusted, set- the voltage to 10 millivolts. (le = :+5 = 40ma). Adjust the opposite side bias pot for minimum hum and noise at the output as shown by the A.C. volt- meter. Check emitter resistor voltages. All should be within the range of 5 - 2

27、0 millivolts. Adjust up or down as required until all emitter voltages are within limits. There is no interaction between the adjusting potentiometers RP-2 and RP-3. Potentiometer RP-1 is factory set for lowest dis- tortion at rated power output at 1KC, and normally should not require adjustment. CA

28、UTION: To obtain accuracy and to prevent meter damage be absolutely certain that there is no signal while making output adjustments. Turn volume control down and do not introduce transients or hum by ac- cidentally touching low-level components.W RAULAND-BORG CORPORATION 3535 West Addison Street Chicago, Illinois 60618_ KI-0961-A 8/71